My first time trying to rely on mix scenes had me puzzled: I wanted to make a mix with certain volumes a bit lower. Since I used gain automation heavily I usually just select the whole curve and drag it up or down to reduce/ increase the overall level. I saved both volumes to a different mix scene and wanted to switch back and forth between the two versions. Then I was a bit upset to find out, that the mix scenes don't actually save any information on automation!
To me seemed so logical and intuitive, since automation is a huge part of mixing. So I really think this feature belongs into Studio One! Hope this makes it!